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Mastering Linux Shell Scripting

You're reading from   Mastering Linux Shell Scripting Master the complexities of Bash shell scripting and unlock the power of shell for your enterprise

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Product type Paperback
Published in Dec 2015
Publisher
ISBN-13 9781784396978
Length 198 pages
Edition 1st Edition
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Author (1):
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Andrew Mallett Andrew Mallett
Author Profile Icon Andrew Mallett
Andrew Mallett
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Table of Contents (16) Chapters Close

Preface 1. What and Why of Scripting with Bash FREE CHAPTER 2. Creating Interactive Scripts 3. Conditions Attached 4. Creating Code Snippets 5. Alternative Syntax 6. Iterating with Loops 7. Creating Building Blocks with Functions 8. Introducing sed 9. Automating Apache Virtual Hosts 10. Awk Fundamentals 11. Summarizing Logs with Awk 12. A Better lastlog with Awk 13. Using Perl as a Bash Scripting Alternative 14. Using Python as a Bash Scripting Alternative Index

Saying Hello World the Python way

The code we write in Python should be clear and uncluttered, sparse is better than dense. We will need the shebang on the first line and then the print statement. The print function includes the newline and we do not need semicolons at the end of the line. We can see the edited version of $HOME/bin/hello.py in the following example:

#!/usr/bin/python3
print("Hello World")

We will still need to add the execute permission, but we can run the code as earlier using chmod. This shown in the following command but we should be a little used to this now:

$ chmod u+x $HOME/bin/hello.py

Finally, we can now execute the code to see our greeting.

Again, knowing at least one language makes it easier to adapt to others and there is not a lot of new features in this.

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